Range-boiler attachment



(No M0881.) Wi S. CLARK. RANGE BOIYLER ATTACHMENT.

No. 478,888. A Patented July 12, 1892.

WITNESSES: W INEDIT@ M IJ? t4/I,

@MKS/jid 4M@ UNITED STATES PATENT CEEICE.

WILLIAM S. CLARK, OF PHILADELPHIA, PENNSYLVANIA.

RANGE-BOILER ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 478,688, dated July 12, 1892.

Application filed April 18, 1890. Serial No. 348,476. (No model.)

To all whom, it may con/cern,.-

Be it known that I, VILLIAM S. CLARK, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Range- Boiler Attachments and I do hereby declare the following to be a sufficiently full, clear, and exact description thereof as to enable others skilled in the art to make and use the said invention.

This invention relates to the hot-water appliances connected with culinary stoves and ranges, and has for its object the avoidance of annoyance of excessive temperature and steam generation in the boilers attached to ranges.

It consists in a chamber, through which the hot water circulates from the water-back of a range or stove in its passage to the reservoir or boiler, and in this chamber an inclosed vessel containing air and provided with an eX- pansible diaphragm which is inflated when the air inclosed rises in temperature and againI collapses when the temperature is reduced. Connected to this diaphragm and operated by it isa valve arranged to open a discharge aperture or tube from the upper part of the boiler and permit hot water to escape when the temperature rises to an undesirable degree.

The invention is shown in the accompanying drawings, in which Figure l represents a range-boiler with this applian e connected thereto, and Fig. 2 a sectional view of the apparatus for working the valve.

A is the water-back of the stove; B, the

boiler; C, a tube leading from the bottom ofV the water-back to the bottom of the chamber D; E, a tube leading from the top of the chamber D to the bottom of the boiler B; F, a tube leading from the side of the boiler B to the upper part of the water-back A.,

G is a copper bowl fitted and secured fluid- `tight in the chamber D; H, a diaphragm secured Huid-tight to the mouth of said bowl by means of the iange J, having centrally attached thereto a guide K and a yoke L, by means of which a valve-body M is secured to the vessel D.

N is a plunger resting against a diaphragm H and having a stern with a regulating-screw bearing against the stem of the valve P in the valve-body M. A spiral spring Q in the valvebody M serves to close the valve P upon its seat. A pipe R leads from the top of the boiler B to the. upper branch M of the valvebody M, and the waste-pipe S leads from the lower branch of the valve-body M. When the temperature of the air rises in the bowl G in consequence of the high temperature of the water in the vessel D, the air expands, acting on the diaphragm H and forcing it outwardly and pressing the screw O against the valve-stem P and opening the valve, permitting an escape of hot water from the upper part of the boiler B through the pipe R, downwardly through the valvebody M, and out through the waste-pipe S. The water so escaping is replaced by colder Water from the pipe F, and the temperature then becoming reduced coolsl the air in the bowl G, and the contraction of the air therein inclosed permits the diaphragm H to collapse, and the reaction of the spring Q and the pressure of the water on the valve P closes said valve until the temperature again rises sufficiently to again expand the air in the bowl G and reopen it, thus venting or emptying the hot water from the boiler B and avoiding the format-ion of steam therein with the usual annoyance of the crackling sounds in the connected pipes, due to the consequent condensation of steam therein, and protecting the connected pipes from the hammering effect o'f water columns'moved by the steam-pressure and the reaction from condensation thereof.

Having described my invention, what I claim is The combination, with the boiler B and its connecting-tubes E, F, and R, of the waterback A, the vessel D, the bowl G, the diaphragm H, thev plunger N, and the connected valve P, all arranged substantially as shown and described, and for the purpose set forth.

IVILLIAM S. CLARK. Witnesses:

J. DANIEL EBY, A. VAN WYOK BUDD. 

